package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * @PackageName: com.itheima.service
 * @ClassName: SpringSecurityUserService
 * @Author: XLB
 * @Date: 2020/3/12 17:16
 * @Description:
 */
@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private UserService userService;

    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user= userService.findByUsername(username);
        if (user==null){
            return null;
        }
        String password = user.getPassword();
        //创建一个list用来存储授权信息
        List<GrantedAuthority> list =new ArrayList<>();


        //动态为当前用户授权
        Set<Role> roles = user.getRoles();
        if (roles!=null&&roles.size()>0){
            for (Role role : roles) {
                //遍历角色集合，为用户授予角色
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                Set<Permission> permissions = role.getPermissions();
                if (permissions!=null&&permissions.size()>0){
                    for (Permission permission : permissions) {
                        //遍历权限集合,为用户授权
                        list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                    }
                }
            }
        }
        org.springframework.security.core.userdetails.User securityUser=
                new org.springframework.security.core.userdetails.User(username,password,list);
        return securityUser;
    }
}
